Greetings, I have recently pruchased <04-12-03> a 1973 ArrowGlass Cheetah with a 1975 Evinrude 115hp OB. The OB starts very quickly but idles rough and when I rev it up a bit <water hose is attached> you can here it missing horribly <sounds terrible>. The last owner said he had it serviced 2 years ago and when I pull a plug I find them to be in good shape but very very wet. I called a dealer and he says the Carbs probably need to be rebuild and it will be $238.00 +tax +parts. I was wondering what else could I check before I do this and how hard is it to rebuild these carbs for a moderatly mechanicaly inclined person.